ULN2003ANSR – TEXAS INSTRUMENTS

The ULN2003ANSR is a high-voltage, high-current Darlington transistor array integrated circuit housed in a 16-pin PDIP package. It features seven independent Darlington pairs, each capable of withstanding a collector-emitter voltage (VCEO) of 50V and sourcing a peak current of 500mA per output. The input logic voltage typically ranges from 1.5V to 7V, offering compatibility with various microcontroller families. Each Darlington pair incorporates a free-wheeling diode to protect against inductive kickback, crucial for driving inductive loads. The device operates with a typical saturation voltage of 1.4V at 500mA, minimizing power dissipation._x000D_
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Common applications leverage the ULN2003ANSR’s ability to drive high-current loads directly from low-voltage logic, such as relays, solenoids, and small motors in industrial control systems, robotics, and general-purpose switching applications. Its high voltage rating makes it suitable for applications where higher voltage loads are encountered. A key advantage is its inherent protection against inductive load transients, simplifying circuit design and reducing the need for external clamping diodes. However, designers should note the relatively high saturation voltage and consider thermal management for continuous high-current operation, potentially requiring heatsinking for sustained loads exceeding 300mA per output.